72 lines
1.8 KiB
PHP
72 lines
1.8 KiB
PHP
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<?php defined('SYSPATH') OR die('No direct script access.');
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/**
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* UTF8::ord
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*
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* @package Kohana
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* @author Kohana Team
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* @copyright (c) 2007-2012 Kohana Team
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* @copyright (c) 2005 Harry Fuecks
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* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
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*/
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function _ord($chr)
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{
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$ord0 = ord($chr);
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if ($ord0 >= 0 AND $ord0 <= 127)
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return $ord0;
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if ( ! isset($chr[1]))
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{
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throw new UTF8_Exception('Short sequence - at least 2 bytes expected, only 1 seen');
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}
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$ord1 = ord($chr[1]);
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if ($ord0 >= 192 AND $ord0 <= 223)
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return ($ord0 - 192) * 64 + ($ord1 - 128);
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if ( ! isset($chr[2]))
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{
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throw new UTF8_Exception('Short sequence - at least 3 bytes expected, only 2 seen');
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}
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$ord2 = ord($chr[2]);
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if ($ord0 >= 224 AND $ord0 <= 239)
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return ($ord0 - 224) * 4096 + ($ord1 - 128) * 64 + ($ord2 - 128);
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if ( ! isset($chr[3]))
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{
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throw new UTF8_Exception('Short sequence - at least 4 bytes expected, only 3 seen');
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}
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$ord3 = ord($chr[3]);
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if ($ord0 >= 240 AND $ord0 <= 247)
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return ($ord0 - 240) * 262144 + ($ord1 - 128) * 4096 + ($ord2-128) * 64 + ($ord3 - 128);
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if ( ! isset($chr[4]))
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{
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throw new UTF8_Exception('Short sequence - at least 5 bytes expected, only 4 seen');
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}
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$ord4 = ord($chr[4]);
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if ($ord0 >= 248 AND $ord0 <= 251)
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return ($ord0 - 248) * 16777216 + ($ord1-128) * 262144 + ($ord2 - 128) * 4096 + ($ord3 - 128) * 64 + ($ord4 - 128);
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if ( ! isset($chr[5]))
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{
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throw new UTF8_Exception('Short sequence - at least 6 bytes expected, only 5 seen');
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}
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if ($ord0 >= 252 AND $ord0 <= 253)
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return ($ord0 - 252) * 1073741824 + ($ord1 - 128) * 16777216 + ($ord2 - 128) * 262144 + ($ord3 - 128) * 4096 + ($ord4 - 128) * 64 + (ord($chr[5]) - 128);
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if ($ord0 >= 254 AND $ord0 <= 255)
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{
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throw new UTF8_Exception("Invalid UTF-8 with surrogate ordinal ':ordinal'", array(
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':ordinal' => $ord0,
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));
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}
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}
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